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Restore file from old commit in git
...you want.
git checkout b6b94f2c19c456336d60b9409fb1e373036d3d71 -- myfile.java
Pass the commit ID AND the file name you want to restore. Make sure you have a space before and after the double hyphen.
There are many other ways to do it but this is the simplest one I can remember.
NOTE: If you are ...
What is the recommended way to delete a large number of items from DynamoDB?
... and keep the rest of your data intact.
This is how you delete a table in Java using the AWS SDK:
DeleteTableRequest deleteTableRequest = new DeleteTableRequest()
.withTableName(tableName);
DeleteTableResult result = client.deleteTable(deleteTableRequest);
...
Maven: The packaging for this project did not assign a file to the build artifact
...s facing this issue.
I face this failed error while I were working on my Java project using IntelliJ IDEA IDE.
Failed to execute goal org.apache.maven.plugins:maven-install-plugin:2.4:install (default-cli) on project getpassword: The packaging for this project did not assign a file to the build a...
What's the difference between String(value) vs value.toString()
Javascript has lot's of "tricks" around types and type conversions so I'm wondering if these 2 methods are the same or if there is some corner case that makes them different?
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How does Hadoop process records split across block boundaries?
...
From hadoop source code of LineRecordReader.java the constructor: I find some comments :
// If this is not the first split, we always throw away first record
// because we always (except the last split) read one extra line in
// next() method.
if (start != 0) {
star...
For i = 0, why is (i += i++) equal to 0?
...lue to added to the prior value, namely 0. So, i ends up with zero.
Like Java, C# has sanitized a very asinine aspect of the C language by fixing the order of evaluation. Left-to-right, bottom-up: the most obvious order that is likely to be expected by coders.
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What is the difference between currying and partial application?
...onfess I haven't fully read yet) is "Currying and Partial Application with Java Closures".
It does look like this is widely-confused pair of terms, mind you.
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Behaviour of increment and decrement operators in Python
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@LennartRegebro: In C++ and Java, i++ only operates on lvalues. If it were intended to increment the object pointed to by i, this restriction would be unnecessary.
– Mechanical snail
Sep 20 '11 at 7:18
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Android preferences onclick event
...
You need to use onPreferenceTreeClick event.
For example see http://www.javased.com/index.php?source_dir=platform_packages_apps_phone/src/com/android/phone/MobileNetworkSettings.java
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { ...
How to determine if binary tree is balanced?
...y is O(n), space is O(1), it's better than top-down solution. I give you a java version implementation.
public static <T> boolean isBalanced(TreeNode<T> root){
return checkBalance(root) != -1;
}
private static <T> int checkBalance(TreeNode<T> node){
if(node == null)...